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Brake Caliper: Disassembly

WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the fluid from the caliper.
    2. CAUTION: Do not place your fingers in front of the piston in order to catch or protect the piston while applying compressed air. This could result in serious injury.
    NOTE: Use just enough air pressure to ease the piston out of the bore. You can damage a blown-out piston even with the padding.
  2. Remove the brake pad. Clean the interior of the caliper with clean shop towels.
  3. Remove the piston.
    • Direct compressed air into the caliper fluid inlet.
    • Use just enough air pressure to ease the piston out of the bore.
  4. Remove the boot using care not to scratch the housing bore. Remove the piston seal with a nonmetal type of tool. See Figure .
  5. Remove the bleeder valve.
  6. Use denatured alcohol in order to clean the following parts:
    • The bleeder valve.
    • The caliper bore.
    • The caliper passages.
    • The piston.
  7. Use dry, filtered, compressed air to dry the parts and to blow out the passages.
  8. Replace any piston with the following conditions:
    • Scoring
    • Nicked
    • Corroded
    • Worn
    • Damaged Chrome Plating
  9. Replace any caliper bore or seal groove with the following conditions:
    • Scoring
    • Nicked
    • Corroded
    • Worn
  10. Attempt to remove any light corrosion on the caliper bore or seal groove using a fine crocus cloth.
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